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Preparation method of tin nanosphere and carbon nanotube composite electrode material, and product and application thereof

A carbon nanotube composite and electrode material technology, which is applied in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, battery electrodes, etc., can solve problems such as fast capacity decay, poor charge-discharge cycle stability, and active material powdering and agglomeration , to improve electrical conductivity, prevent agglomeration, and improve cycle stability

Active Publication Date: 2019-03-29
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the serious volume expansion of metal tin in the process of deintercalating lithium, the volume expansion rate can be as high as 259%, so problems such as pulverization and agglomeration of active materials are prone to occur during the charge and discharge process, resulting in rapid capacity decay and lead to charge and discharge failures. poor cycle stability

Method used

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  • Preparation method of tin nanosphere and carbon nanotube composite electrode material, and product and application thereof
  • Preparation method of tin nanosphere and carbon nanotube composite electrode material, and product and application thereof

Examples

Experimental program
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Embodiment 1

[0025] A method for preparing a composite electrode material of tin nanospheres and carbon nanotubes, using a microporous polymer nanotube material as a load carrier, and preparing a composite electrode material of metal tin and carbon nanotubes through high-temperature carbonization treatment, comprising the following steps:

[0026] a. Preparation of ethanol solution of tin salt: prepare 100 ml of SnCl with a concentration of 50 mg / ml 2 The ethanol solution of adding in the three-neck flask of 250ml;

[0027] b. Nitrogen replacement: replace the air in the above solution with nitrogen through vacuuming-nitrogen filling operation, so that the nitrogen atmosphere is maintained in the three-necked flask;

[0028] c. Add microporous polymer nanotubes: Weigh 30 mg of microporous polymer nanotubes and add them to the solution under nitrogen protection, and stir at room temperature for 6-8 h under nitrogen protection;

[0029] d. Suction filtration and drying: Suction filtration o...

Embodiment 2

[0032] A preparation method of a composite electrode material of tin nanospheres and carbon nanotubes, comprising the steps of:

[0033] a. Preparation of ethanol solution of tin salt: prepare 100 ml of ethanol solution of stannous acetate with a concentration of 50 mg / ml and add it to a 250 ml three-necked flask;

[0034] b. Nitrogen replacement: replace the air in the above solution with nitrogen through vacuuming-nitrogen filling operation, so that the nitrogen atmosphere is maintained in the three-necked flask;

[0035] c. Add microporous polymer nanotubes: Weigh 30 mg of microporous polymer nanotubes and add them to the solution under nitrogen protection, and stir at room temperature for 6-8 h under nitrogen protection;

[0036] d. Suction filtration and drying: Suction filtration of the above mixed solution and collection of solid powder, and vacuum drying of the collected solid powder at 60°C for 3 hours;

[0037] e. High-temperature carbonization treatment: The above-...

Embodiment 3

[0039] A preparation method of a composite electrode material of tin nanospheres and carbon nanotubes, comprising the steps of:

[0040] a. Preparation of ethanol solution of tin salt: prepare 100 ml ethanol solution of dibutyltin dilaurate with a concentration of 50 mg / ml and add it to a 250 ml three-necked flask;

[0041] b. Nitrogen replacement: replace the air in the above solution with nitrogen through vacuuming-nitrogen filling operation, so that the nitrogen atmosphere is maintained in the three-necked flask;

[0042] c. Add microporous polymer nanotubes: Weigh 30 mg of microporous polymer nanotubes and add them to the solution under nitrogen protection, and stir at room temperature for 6-8 h under nitrogen protection;

[0043] d. Suction filtration and drying: Suction filtration of the above mixed solution and collection of solid powder, and vacuum drying of the collected solid powder at 60°C for 3 hours;

[0044] e. High-temperature carbonization treatment: the above...

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Abstract

The invention discloses a preparation method of a tin nanosphere and carbon nanotube composite electrode material, and a product and application thereof. A microporous polymer hollow nanotube is employed, and the material of the microporous polymer hollow nanotube serves as a load carrier. The tin nanosphere and carbon nanotube composite electrode material is prepared through high-temperature carbonization processing. The method comprises the steps: trying to taking the material of the microporous polymer hollow nanotube serves as the load carrier, and preparing the tin nanosphere and carbon nanotube composite electrode material through the high-temperature carbonization processing. Because a microporous carbon nanotube is formed by the high-temperature carbonization of the microporous polymer nanotube, the wall of the nanotube is also of a microporous structure, wherein the microporous structure can enable the metal tin nanoparticles to be firmly fixed on the wall of the tube. Therefore, the material serving as the negative material of a lithium ion battery can effectively prevent the metal tin from being gathered in a charging and discharging process, and improves the charging and discharging cycle stability. Meanwhile, the carbon material can facilitate the improvement of the conductivity of the tin-based negative material.

Description

technical field [0001] The invention relates to a preparation method of an electrode material composed of tin nanosphere particles and carbon nanotubes, as well as its product and application. It specifically relates to an electrode material in which highly dispersed metal tin nanospheres with a diameter of about 10-40 nm and carbon nanotubes are composited by using microporous polymer nanotubes with a diameter of about 50 nm as a carrier. Background technique [0002] Since the lithium storage mechanism of metal materials such as metal tin belongs to the process of alloying lithium storage, such metal materials react with lithium ions to form various lithium-based alloys when storing lithium. Compared with the graphite negative electrode material of the insertion lithium storage mechanism, Metal materials such as metal tin have higher lithium storage capacity, and the theoretical capacity of tin can be as high as 994 mAh / g. Therefore, tin-based anode materials have receive...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/583H01M4/62H01G11/30H01G11/32H01G11/24H01G11/86
CPCH01G11/24H01G11/30H01G11/32H01G11/86H01M4/362H01M4/387H01M4/583H01M4/625Y02E60/10
Inventor 何丹农陈振林琳王敬锋徐少洪金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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